stflhler



Patented Jan. I], I899.

m. amass.

C. T. D638 8; M. STUHLEB. MEANS FOR AUTOMATICALLY OPERATING BULKHEAD DOORS.

(Application filed Oct. 6, 1897.)

9 Sheets-Shaat l.

(No Model.)

m. 6if; 85. Patented Ian. I7, 1399.

- u T. 00m: & m. STUHLER.

HEM; FUR AUTOMATICALLY OPERATING BULKHEAD DOORS.

(Application filed Oct. 6, 1897.)

wm muel.)

9 Shaets-$heet 2.

Jnve n 20 715:

Wlinessez- Patented Ian. 177E399.

C. T. DGRR & M. STUHLER.

MEANS FOR AUTOMATICALLY OPERATING BULKHEAD DOORS.

' (Application filed on. e, 1897.) (No Model.) 9 Sheets-Sheet 3.

Patented Ian. 17, 13%.

Q. T. DURR 8v. M. STD'HLER. MEANS FOR AUTUNATICALLY OPERATING BULKHEAD DOORS.

" (Application filed Oct. 6, 1897.)

9 Sheets--Shgt 4.

(No Model.)

iwfnem eJ-r- (No Model.)

iiiiinewea- Fkitented Jan. E1898.

0. T. nfima & M. STUH'LER. MEANS FOR AUTOMATICALLY OPERATING BULKHEAD DOORS.

9 Sheets$heet 5.

(Application filed ocp. e, 1897.)

JnvE'nie'nsn MEANS FDR AUTUHfATICALLY GPERATING BULKHEAD DOORS.

(Applicatinn filed Oct. e, um.

- 9 Sheets-sheet 6.

Ina/e721 0m:

m0. amass. Patented ran. 17, lass; c. T. omen & m. sfiluuzn. ElEANS FOB AUTOMATICALLY OPERATING BULKHEAD D0088,

(Application filed Oct. 6, 1897.)

9 Sheets-{Sheet 7.

1m mull 'Invnivrs.

C. T. DORE & WI. STUHLER.

Patented Jan. 17, may

MEANS FOR AUTOMATICALLY DPERfiATING BULKHEAD 00088.

(Application filed. Oct. 6, 1897.)

qNo Model.)

. 9 Sheets-Sheei 8.

minesseai- I Inven ions:

No. 617,855; P-atnted 1 l7, I899. c. T. 00m? & m. STUHLER.

MEANS FOR AUTOMATICALLY OPERATING BUL-KT-I E'AD DOORS.

(Application filed Oct. 6, 1897.)

9 Sheets--Sheet 9.

(No Model.)

1ll- IS 17117283395 1 hme'niomi To wZ-L whom it may concerns a v Be it known'that we, CARLTHEODORDORR @ATRNT NiTED STATES :FFICEEQQ CARL THEODOR DORR AND MARTIN sTUHL-ER, or conceive, ER ANY; SAID sriiimna AssIe o TO SAID DORRJ; 2 l

MEANS FOR AUTOMATICALLY OPERATING,BuLK EAD-ooons. A

srnerrrcn'rron forming part of Letters r atent No. 617,855, dated January 17, 189 9.

Applicatlonfiledootoher 3.1897. Serial Nil-654,228 .(No model.) I

and MARTIN STI'JHLER, of Cologne, in thej Kingdom of Prussia,'Gernian Empire, have invented a new and useful Improvement in Means for Automatically OperatingBnlkfication I 1 This. invention has referenceto apparatus for automatically closing and opening bulk;

. head-Doors, of which the following is a specihead-doors, and especially toimprovements inthe means which are described for the same. purpose in the United States Patent No. 588,793, granted to us on Augusta;- 1897. By these improvements the apparatus ma be essentially simplified in its construction,

several parts may be entirely dispensed with," and by some modification in the parts of theapparatus the latter may be capable of working with compressed air or with liquid under pressure instead of working with compressed air and liquid under pressure combined.

The main improvement includes a difierential steering-valve used in the apparatus for controlling the passage of the pressure medium or mediums in order to makea pisten working in a cylinder operate to automatically close or open the bulkhead-doors.

The differential valve, which may be either apiston-valve or a slide-valve provided with pistons of different areas, against which the pressure medium or mediums mtmifs'placed, according to the present invent1un, -'parallel with the secondary receiver and withlthe cylinder and piston and may have its passages organized to work in combination with a back-pressure valve provided for the secondary receiver and with two conduits for compressed air and liquid under pressure, or the air only from the remaining conduit. By

another modification of the apparatus passages of the diiierentia'l piston-valve may be organizedin such manner as to dispense with the back -'pressure valve, the difierential valve being in such 'case actuated either by i the alternate action of the two pressure mediums (airan'd liquid) or by one ofthese mediums alone; Byafurthenmodification we dispense withthe'seeondary receiver and its back-pressure valve, arranging the conduits for the pressure mediums and the passages in the differential :pressu're'-valvefso as to operate (without the secondary receiverathe piston in theeylinder to automaticallyc ose and open the bulkhead-doors.

saiddoors depen ds, as in our former patent referred to, upon the relief of pressure in the conduitconveying the pressure. medili msto the diffe rential'valve,i by which medium the valve has'upto such relief kept the bulkhead .door open. f

- The improvements will be readily understood by the following description,with reference to the annexed drawings. I 1 Figures ,1 and 1" together represent a verti'e'alsection of an apparatus for, Operating" horizontally-moving doors, showing the main pressure-receiver, the secondary receiver with its baek-pressurevalve, the cylinder It is well nu i derstood that the automatic operation of the with its piston, the two conduits for pressure mediums, and the difi'erential valve, the latter in such'a' position (called hereinafter at rest) so that the bulkhead-door is kept open. Figs. 2 and 2* together represent invertical section the sameelements, except that of the conduit forpressure medium is dispensed with by means of a modification of theremaining conduit near the diderential valve, the piston being, as shown in Fig. 2, in such a position (called hereinafter fat work) so that the bulkhead-dooris in the act of clos:

ing. Figs. 3 e114 show vertical sections of a diiferential v life at restand atwork, respectively, in eomection withjtwoleonduits for pressure mediums and with passages so organized as to dispense with the backpre'ssure valve of the secondary receiver. Figs. g 5 and 6 show vertical sections'of a difierential,

valve at rest and at work in connection with one conduit for a pressure'medium and with passages soforganized as to dispense with the back-pressure '.valve of the secondary receiver. Figs. 7 and 7* together represent in vertical section, withthe difierential valve at rest, an apparatus in whichthe conduits for ameteror area of the valve '0 and said piston and cylinder are at one end smaller in diameter than at theother end. The casing of'the valve has two openings 19 and n, not opposite to each other. From this arrangement it will be obviously understood that'if pressure is admitted to the greater dipiston it will adopt the position Fig. 1,'in which the central boring communicates with the B behind or at the right-hand side of the piston E and with the open air; but'if the pressure against the greater area be released and pressure he admitted against the annular surface of the valve-piston. through 19 the piston will be shifted and the pressure medium proceeds by a into the cylinder B for causing the outstroke of piston Now, according to Figs. 1 and 1*, the compressed air may traverse from the receiver 0 through the conduit A and the backpressure pass to the secondary receiver A, thenceby 1) into the casing of the differential valve D and may operate upon the differential annular surface of the latter, as explained above. The pressure-waterfrom the receiver 0 flows through the conduit B, provided with the escape-valves II G h, acts upon the larger surface of the difierential valve D, and holds this, as well as the main piston E, securelyin its innermost posit-ion. The main piston E is connected by the piston-rod e with the door-F, which is shown open or at rest. The water which escapes past the piston E through the packing passes by 'n and 0 out of the apparatus through an escape-pipe. A suitable number ofrelief-valves G II it are inserted in the pressure-water conduit B, which as soon as they are actuated relieve the branch or subbranch to which they correspond from pressure and simultaneously close the comm unicatio'fi'with the conduit 15, lealing to C.

II and h are three-way cocks or-slides either of which, 7t for example, may conveniently be situated neareaeh door and one or more, II, inserted at s uitable principal parts of the conduit. If, for example, h be turnedin the direction of the arrow, the portion of the pressure-watcrconduit B leading from the main cylinder or receiver 0 will be closed and the other portion, leading to thecyllnder l3 and in com munication with the exit-pipe .2 will be opened. Thiswill be clearon comparison with Figs. 2and 2?,which represent the apparatus andall the valves at work. The unrelieved part of the cylinder compressed air in the secondary receiver A consequently now moves the differential valve D, by acting against the smaller annular pres G is a difierential valve which in the one i end position, Fig. 1*, connects the portion of the pressure-water conduit B leading to B with the receiver 0 and in the other end position, Fig.- 2*, with the exit-pipe .2' in exactly the same way as this is attained by the three Way cock. This differential valve G isactu ated by the elasticityof the locked-11 p pressure-water, which so acts upon the lower surface of the piston that G alwaystends to as 3 y sume the position shown in Fig. 2., In order to now securely retain G in its position of rest, the hand-actuated bolt g shown in thedrawings, for example, may be'employed, or other suitable stop mechanism which is adapted to be automatically released by the rising of 'a float or the excitation of an electric magnet may be employed. fected, G is driven out, the relieved pressure fluid expelled through stand the door closed.

If the previously-actuated escape-valves of the compartments which are free of water he returned to their initial position, the dilferen tial valves D are automatically reversed by,

\Vhen the release is cfthe pressure of water in the conduit B and i the compressed air which is behind the pisstons exhausts through the channel 11 0 into the atmosphere. piston the door has beenopcned again.

By the return stroke of the The arrangement permits of a number of modifications in its practical. application, which nevertheless do not alfect the essence of the invention. rangement described with reference to Figs. 1 and 1* compressed air may be employed as the pressure fluid, so that the apparatus may be actuated exclusively by compressed air;

For example, in the aror the apparatus may be actuated with only H compressed-air ..conduit, Figs. Band 2*,

by omittingthe conduit A and leading the.

compressed air through a branch J of the re lief-conduit B by way of 12' into the secondvalve 1) may be dispensed with it the modifications of the difierential valve D shown in Figs. 3 to 6 or any modification of alike na- I 1 25 ture is adopted. 7 When twoconduits A and B are employed,'(sce Fig. 3, which shows the position at rest, and Fig, 4, which shows the,

position at work,) the compressed air from "ary receiver A.'- Further, the back-pressure the conduit A passes through a circular groove of the valve D and through the aperture 1; into the cylinder A. If the conduit 13 is relieved of pressure, the circular groove is displaced pressure exerted, through the opening 10 on'the annular area of. the valves piston and v.is closed. (See Fig. 4;.)

If only oneconduit'B isemployedg (see 'Fi g. 5, rest position, and Fig. 6, working position), the compressed air from the'c'onduit acts first upon the larger bottom surface of the differ. ential valve D, drives this into-the end posior, Fi ,-and passes y suitably disposed impediments or obstacles in the form of an annular groove through the aperture r into the secondary receiver A. If the pressure in conduit B is suddenly relieved, the diderential valve D is driven by the compressed air acting upon the differential annnlar surface into the opposite end position, whereby,

'v' is again closed. (See Fig. 6.}

In order'to dispense with the secondary receiver A and to employ the cylinder B only, then for sliding'doors two conduits are .necessary-namely, the pressure-relief conduit B and the pressure-conduit A, through which the operating pressure medium is led from the central receiver. This modification, which is represented in Figs. 7, 7*, S, and 8 differs from the form of apparatus shown in Figs. 1 and 1*, the back-pressure valve '0 and secondary receiver A being omitted. With this modification of apparatus there may be emp y as the nr s miewm d innr either .conlwr.

"pissedfzTir in the one conduit and pressure liquid in the other or pressure liquid or pressure air may be employed in both conduits. In case of the pressure liquid the latter must, 5 in accordance with the above description, be' under the elastic reaction of a column of compressed air from suitablepumping apparatus. It is obvious from the above statements that the differential piston-valve Ora differential slide and piston valve may bearranged to work with or without a secondary receiver,

with ofiitlnout a back-pressure valve in the latter, with t'mgonduits for the same or for two different pressure mediums, or with one donduitrfor compressed air or for liquid under pressure, the facts lieing that the change of position of the differential valves, piston, or slide, which causes the donr to open or to close, is always caused by a relief f pressure in the one pressure-medium com it or in a" ranch of such conduit.

What we claim as our. invention is 1. In an apparatus for automatically operating bulkhead-d oors, a working cylinder with piston connected to the door, pressure-me di'um' conduits, a differential piston-valve arranged parallel with said cylinder and having within itself a central bore with a laterallybranching passage for communication with the open air and .tcmperaril-y with -tho' work- 6oing cylinder, and openings provided in the casing of said valve to form communication temporarily through that portion of said valve which is of smaller diameter for the shifting of said valve and the entrance of pressure medium into the cylinder to produce the outstrokeof the working piston therein; all substantially as herein described.

2. In an apparatus for automatically operating bulkhead doors a working cylinder with piston connected to the door, two pres sure-medium conduits, a differential pistonvalve arranged parallel with the said cylinder and having a central bore with lateral branch passage and having openings in its casing, a secondary pressure-receiver, and a back-pressure valve in said receiver communicating with one of the pressure-n1edium conduits, the other pressure-medium conduit communicating with said cylinder and with A thelargnn area. flfi-Il-Eul efferentialvalve, sub

stantially as herein described. r 3. In an apparatus for automatically operating 'bulkhead-doors, a Working cylinder with piston connected to the door, a secondary receiver with back-pressure valve, a differential piston-valve arranged parallel with said cylinder and said receiver and having in itself a central bore and lateral branch passage for communication With openings in its casing, and a source of pressure for communication with said cylinder and said receiver through said piston-valve, substantiallvas herein described.

In testimony'that we claim thei'oreg 'ng as a new invention we have signed onr names in presence of two subscribing wit r scs.

CARL 'IIIEO DOR DURR. I MARTIN STUl-ILER. Witnesses: 

